[sdiy] My new Moog 960 sequencer clone module project.. slowly but surely ..

Mon Nov 9 23:03:40 CET 2020

What I do with rotary switches is I make sure they are at the corner of the
panel PCB, then I actually cut that part of the PCB away with a bandsaw and
connect it to the main part with wires.  It takes a little bit of planning,
but is otherwise pretty easy.

Thinking about J-P's sequencer, even if he only made a panel PCB just for
the pots, and hand-wired all the switches and jacks, that would still save a
huge amount of wiring hassle.  I've done that many times myself.

  _____  

From: info synthcube.com [mailto:info at synthcube.com] 
Sent: Monday, November 09, 2020 1:20 PM
To: ColinMuirDorward; David G Dixon
Cc: Dave Brown; jpdesroc at oricom.ca; tom at electricdruid.net; john slee;
Synth-diy at synth-diy.org
Subject: RE: [sdiy] My new Moog 960 sequencer clone module project.. slowly
but surely ..

[CAUTION: Non-UBC Email] 

Switches are the main issue here--- pots and jacks work well together, but
most of the 'standard' DIY switches don't seem to work from a height
standpoint--- neither the mini toggles, nor the submini toggles-and
rotaries- fuhgeddaboudit 

From: ColinMuirDorward <colindorward at gmail.com> 
Sent: Monday, November 9, 2020 5:15 PM
To: David G Dixon <dixon at mail.ubc.ca>
Cc: Dave Brown <davebr at modularsynthesis.com>; info synthcube.com
<info at synthcube.com>; jpdesroc at oricom.ca; tom at electricdruid.net; john slee
<indigoid at oldcorollas.org>; Synth-diy at synth-diy.org
Subject: Re: [sdiy] My new Moog 960 sequencer clone module project.. slowly
but surely ..

Is anyone using Song Huei R1212N-M
<http://www.song-huei.com/exec/product.php?mod=show&cid=58&pid=R1212N-MetalS
haft&lg=E> ?

Vertical mount potentiometer, 10mm rise, mechanical mounting points, A, B,
C, W tapers available, rated for 15000 cycles.

10mm rise puts them in the same family as the usual PCB-mount eurorack
minijacks.

The missing link for me is a nice group of switches to choose from. I'm
using more shallow (8mm rise/) subminiature SPST toggles right now, which
fit well, but they are not really good quality feeling.

Colin

On Mon, Nov 9, 2020 at 12:49 PM David G Dixon <dixon at mail.ubc.ca> wrote:

That's a good idea if you have the panel at hand.  Sometimes, I am making
PCBs for a client and the actual panel is in a different country.

For the pots I use, the solder tabs tend to bend slightly as needed to
adjust to the correct spacing.  In any case, I lay out all my panels and my
PCBs on a strict 0.1" spacing grid, so things generally slip into their
respective holes with ease.  The most unforgiving parts are switches with
two or more rows of tabs, such as DPDT switches.  These must be aligned
correctly.

  _____  

From: Dave Brown [mailto:davebr at modularsynthesis.com] 
Sent: Monday, November 09, 2020 12:08 PM
To: 'David G Dixon'; 'info synthcube.com'; jpdesroc at oricom.ca;
tom at electricdruid.net
Cc: 'john slee'; 'Synth-diy at synth-diy.org'
Subject: RE: [sdiy] My new Moog 960 sequencer clone module project.. slowly
but surely ..

[CAUTION: Non-UBC Email] 

I do this for all panel components - pots, jacks, switches, and LEDs. I'll
tack solder just one lead so I can get the panel on and everything aligned.
Typically the pots aren't quite at the right height and this puts stress on
the phenolic which can crack.   Once the panel is on I reflow the jacks,
pots, and switches. Sometimes I can hear a "pop" as the pot lead relaxes and
it adjusts to the correct height. I do the LEDs as you described.

Someone once sent me a Buchla 248 with all the switches soldered on with no
panel. Of course none of them lined up and it is hard to remove the solder
completely so you can realign. I ended up having to redrill all 35 switch
holes oversize and file some to fit.

Dave

From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of David
G Dixon
Sent: Monday, November 09, 2020 11:43 AM
To: 'info synthcube.com'; jpdesroc at oricom.ca; tom at electricdruid.net
Cc: 'john slee'; 'Synth-diy at synth-diy.org'
Subject: Re: [sdiy] My new Moog 960 sequencer clone module project.. slowly
but surely ..

LEDs can also be a challenge to solder into panel PCBs as they might not be
at the correct height for poking through the panel.  The best way to install
LEDs is to first install all of the other components, then stuff the LED
leads into the PCB loosely, then actually attach the panel (with at least a
few nuts) and push the LEDs into their panel holes while the panel sits
upsidedown on the bench.  In this way, all the LEDs are at the correct
height.  I have also made LED jigs from scraps of PCB material (of which I
have many pounds!) that bridge two adjacent components.

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